CameraSettings.java revision 73e782de608cbe2ddffd75c055009ff2e208f78b 
1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.camera;
18
19import android.app.Activity;
20import android.content.Context;
21import android.content.SharedPreferences;
22import android.graphics.drawable.Drawable;
23import android.hardware.Camera.Parameters;
24import android.hardware.Camera.Size;
25import android.os.SystemProperties;
26import android.preference.PreferenceManager;
27import android.util.Log;
28
29import java.util.ArrayList;
30import java.util.List;
31
32/**
33 *  Provides utilities and keys for Camera settings.
34 */
35public class CameraSettings {
36    private static final int NOT_FOUND = -1;
37
38    public static final String KEY_VERSION = "pref_version_key";
39    public static final String KEY_RECORD_LOCATION =
40            RecordLocationPreference.KEY;
41    public static final String KEY_VIDEO_QUALITY =
42            "pref_camera_videoquality_key";
43    public static final String KEY_VIDEO_DURATION =
44            "pref_camera_video_duration_key";
45    public static final String KEY_PICTURE_SIZE = "pref_camera_picturesize_key";
46    public static final String KEY_JPEG_QUALITY = "pref_camera_jpegquality_key";
47    public static final String KEY_FOCUS_MODE = "pref_camera_focusmode_key";
48    public static final String KEY_FLASH_MODE = "pref_camera_flashmode_key";
49    public static final String KEY_VIDEOCAMERA_FLASH_MODE = "pref_camera_video_flashmode_key";
50    public static final String KEY_COLOR_EFFECT = "pref_camera_coloreffect_key";
51    public static final String KEY_WHITE_BALANCE =
52            "pref_camera_whitebalance_key";
53    public static final String KEY_SCENE_MODE = "pref_camera_scenemode_key";
54
55    public static final int CURRENT_VERSION = 3;
56
57    // max mms video duration in seconds.
58    public static final int MMS_VIDEO_DURATION =
59            SystemProperties.getInt("ro.media.enc.lprof.duration", 60);
60
61    public static final boolean DEFAULT_VIDEO_QUALITY_VALUE = true;
62
63    // MMS video length
64    public static final int DEFAULT_VIDEO_DURATION_VALUE = -1;
65
66    @SuppressWarnings("unused")
67    private static final String TAG = "CameraSettings";
68
69    private final Context mContext;
70    private final Parameters mParameters;
71
72    public CameraSettings(Activity activity, Parameters parameters) {
73        mContext = activity;
74        mParameters = parameters;
75    }
76
77    public PreferenceGroup getPreferenceGroup(int preferenceRes) {
78        PreferenceInflater inflater = new PreferenceInflater(mContext);
79        PreferenceGroup group =
80                (PreferenceGroup) inflater.inflate(preferenceRes);
81        initPreference(group);
82        return group;
83    }
84
85    public static void initialCameraPictureSize(
86            Context context, Parameters parameters) {
87        // When launching the camera app first time, we will set the picture
88        // size to the first one in the list defined in "arrays.xml" and is also
89        // supported by the driver.
90        List<Size> supported = parameters.getSupportedPictureSizes();
91        if (supported == null) return;
92        for (String candidate : context.getResources().getStringArray(
93                R.array.pref_camera_picturesize_entryvalues)) {
94            if (setCameraPictureSize(candidate, supported, parameters)) {
95                SharedPreferences.Editor editor = PreferenceManager
96                        .getDefaultSharedPreferences(context).edit();
97                editor.putString(KEY_PICTURE_SIZE, candidate);
98                editor.commit();
99                return;
100            }
101        }
102        Log.e(TAG, "No supported picture size found");
103    }
104
105    public static void removePreferenceFromScreen(
106            PreferenceGroup group, String key) {
107        removePreference(group, key);
108    }
109
110    public static boolean setCameraPictureSize(
111            String candidate, List<Size> supported, Parameters parameters) {
112        int index = candidate.indexOf('x');
113        if (index == NOT_FOUND) return false;
114        int width = Integer.parseInt(candidate.substring(0, index));
115        int height = Integer.parseInt(candidate.substring(index + 1));
116        for (Size size: supported) {
117            if (size.width == width && size.height == height) {
118                parameters.setPictureSize(width, height);
119                return true;
120            }
121        }
122        return false;
123    }
124
125    private void initPreference(PreferenceGroup group) {
126        ListPreference videoDuration = group.findPreference(KEY_VIDEO_DURATION);
127        ListPreference pictureSize = group.findPreference(KEY_PICTURE_SIZE);
128        ListPreference whiteBalance =  group.findPreference(KEY_WHITE_BALANCE);
129        ListPreference colorEffect = group.findPreference(KEY_COLOR_EFFECT);
130        ListPreference sceneMode = group.findPreference(KEY_SCENE_MODE);
131        ListPreference flashMode = group.findPreference(KEY_FLASH_MODE);
132        ListPreference focusMode = group.findPreference(KEY_FOCUS_MODE);
133
134        // Since the screen could be loaded from different resources, we need
135        // to check if the preference is available here
136        if (videoDuration != null) {
137            // Modify video duration settings.
138            // The first entry is for MMS video duration, and we need to fill
139            // in the device-dependent value (in seconds).
140            CharSequence[] entries = videoDuration.getEntries();
141            entries[0] = String.format(
142                    entries[0].toString(), MMS_VIDEO_DURATION);
143        }
144
145        // Filter out unsupported settings / options
146        if (pictureSize != null) {
147            filterUnsupportedOptions(group, pictureSize, sizeListToStringList(
148                    mParameters.getSupportedPictureSizes()));
149        }
150        if (whiteBalance != null) {
151            filterUnsupportedOptions(group,
152                    whiteBalance, mParameters.getSupportedWhiteBalance());
153        }
154        if (colorEffect != null) {
155            filterUnsupportedOptions(group,
156                    colorEffect, mParameters.getSupportedColorEffects());
157        }
158        if (sceneMode != null) {
159            filterUnsupportedOptions(group,
160                    sceneMode, mParameters.getSupportedSceneModes());
161        }
162        if (flashMode != null) {
163            filterUnsupportedOptions(group,
164                    flashMode, mParameters.getSupportedFlashModes());
165        }
166        if (focusMode != null) {
167            filterUnsupportedOptions(group,
168                    focusMode, mParameters.getSupportedFocusModes());
169        }
170    }
171
172    private static boolean removePreference(PreferenceGroup group, String key) {
173        for (int i = 0, n = group.size(); i < n; i++) {
174            CameraPreference child = group.get(i);
175            if (child instanceof PreferenceGroup) {
176                if (removePreference((PreferenceGroup) child, key)) {
177                    return true;
178                }
179            }
180            if (child instanceof ListPreference &&
181                    ((ListPreference) child).getKey().equals(key)) {
182                group.removePreference(i);
183                return true;
184            }
185        }
186        return false;
187    }
188
189    private void filterUnsupportedOptions(PreferenceGroup group,
190            ListPreference pref, List<String> supported) {
191
192        CharSequence[] allEntries = pref.getEntries();
193
194        // Remove the preference if the parameter is not supported or there is
195        // only one options for the settings.
196        if (supported == null || supported.size() <= 1) {
197            removePreference(group, pref.getKey());
198            return;
199        }
200
201        CharSequence[] allEntryValues = pref.getEntryValues();
202        Drawable[] allIcons = (pref instanceof IconListPreference)
203                ? ((IconListPreference) pref).getIcons()
204                : null;
205        ArrayList<CharSequence> entries = new ArrayList<CharSequence>();
206        ArrayList<CharSequence> entryValues = new ArrayList<CharSequence>();
207        ArrayList<Drawable> icons =
208                allIcons == null ? null : new ArrayList<Drawable>();
209        for (int i = 0, len = allEntryValues.length; i < len; i++) {
210            if (supported.indexOf(allEntryValues[i].toString()) != NOT_FOUND) {
211                entries.add(allEntries[i]);
212                entryValues.add(allEntryValues[i]);
213                if (allIcons != null) icons.add(allIcons[i]);
214            }
215        }
216
217        // Set entries and entry values to list preference.
218        int size = entries.size();
219        pref.setEntries(entries.toArray(new CharSequence[size]));
220        pref.setEntryValues(entryValues.toArray(new CharSequence[size]));
221        if (allIcons != null) {
222            ((IconListPreference) pref)
223                    .setIcons(icons.toArray(new Drawable[size]));
224        }
225
226        // Set the value to the first entry if it is invalid.
227        String value = pref.getValue();
228        if (pref.findIndexOfValue(value) == NOT_FOUND) {
229            pref.setValueIndex(0);
230        }
231    }
232
233    private static List<String> sizeListToStringList(List<Size> sizes) {
234        ArrayList<String> list = new ArrayList<String>();
235        for (Size size : sizes) {
236            list.add(String.format("%dx%d", size.width, size.height));
237        }
238        return list;
239    }
240
241    public static void upgradePreferences(SharedPreferences pref) {
242        int version;
243        try {
244            version = pref.getInt(KEY_VERSION, 0);
245        } catch (Exception ex) {
246            version = 0;
247        }
248        if (version == CURRENT_VERSION) return;
249
250        SharedPreferences.Editor editor = pref.edit();
251        if (version == 0) {
252            // For old version, change 1 to 10 for video duration preference.
253            if (pref.getString(KEY_VIDEO_DURATION, "1").equals("1")) {
254                editor.putString(KEY_VIDEO_DURATION, "10");
255            }
256            version = 1;
257        }
258        if (version == 1) {
259            // Change jpeg quality {65,75,85} to {normal,fine,superfine}
260            String quality = pref.getString(KEY_JPEG_QUALITY, "85");
261            if (quality.equals("65")) {
262                quality = "normal";
263            } else if (quality.equals("75")) {
264                quality = "fine";
265            } else {
266                quality = "superfine";
267            }
268            editor.putString(KEY_JPEG_QUALITY, quality);
269            version = 2;
270        }
271        if (version == 2) {
272            editor.putString(KEY_RECORD_LOCATION,
273                    pref.getBoolean(KEY_RECORD_LOCATION, false)
274                    ? RecordLocationPreference.VALUE_ON
275                    : RecordLocationPreference.VALUE_NONE);
276            version = 3;
277        }
278        editor.putInt(KEY_VERSION, CURRENT_VERSION);
279        editor.commit();
280    }
281}
282